Long-stroke pumping mechanism



1 26 1927. y F. F. HILL LONG STROKE PUMPING MECHANISM V 2 Sheets-Sheet l 1,637,078 July 1927- F.'F. HILL LONG STROKE PUMPING MECHANISM Filed A112- 5. 1925 0 Sheet -Sheet w j .4

Patented July- 26, 1927.

PATET @FFIQE.

FRANK F. HILL, 01' LOS ANGELES, CALIFQRNIA.

LONG-STROKE PUMPING MECHANISM.

Application filed August 3, 1925. Serial No. 47,773.

This invention relates to a novel form of dump operating mechanism. In the oil ;umping industry it is found that it is often possible to increase the eiliciency of the pump by lengthening the stroke of the plunger. lhe common form of walking beam construction cannot give a stroke of more than four feet, which'stroke is'much shorter than is sometimes desirable.

It is an objpct of my invention to provide a pump operating mechanism which will give the pump plunger a very long stroke.

It is another object of my invention to provide a long stroke pump operating mechanism having a counterbalance for reducing the power consumption of the pump operating mechanism.

It is another object of my invention to provide a pump operating mechanism which will not laterally deflect the polish rod. It is also an object of my invention to provide a pump operating mechanism having novel means for converting rotary motion into reciprocating motion.

It is a still further object of my invention to provide a pump operating mechanism which will quickly accelerate the pump plunger to its maximum speed and uniformly operate it thereafter throughout almost the entire stroke.

It is also an object of my invention to provide a pump operating mechanism in which thestroke is adjustable.

t is an additional object of my invention to provide a pump operating mechanism which is so constructed that it may be easily removed from place so that the pump rods or pulsing may he easily pulled from the wel It is also an object of my invention to provide a pump operating mechanism having a crown which may he swung into raised extension.

it is another object of my invention to provide a novel connection means between the mechanism for converting rotary motion into reciprocating motion and a reciprocating member of my invention.

Other ob'ects and advantages of my invention will be made evident hereinafter. 1

Beferrin to the two sheets of drawings in which 1 illustrate a preierrecl form of my invention l is an elevationel view ofia construc tion embodying the features of my invention.

Fig. 2 is an elevational view taken as indicated by the arrow 2 of Fig. 1.

I Fig. 3 is a plan view of Fig. 1.

Fig. 4 is a fragmentary view of Fig. 1 taken as indicated by the arrow 4 of Fig. 1.

Fig. 5 is an enlarged fragmentary view showing the novel connection member of my invention.

Fig. 6 is a partially sectioned. view taken as indicated by the l ne "0-45 of Fig. 5.

Fig. 7 is a sectional view taken as indicated by the line 7-7 .of Fig. 5.

Fig. 8 is a vertical section taken as indicated by the line 3-'-8 of Fig. 5.

With reference to Figs. 1 to 3 inclusive of the drawings, my invention provides a supporting structure having rear vertical posts 11 and forward vertical posts 12. The lower ends of the rear vertical posts ll are secured together by cross channels 13 and the upper ends are secured together by a cross channel 14. The lower ends of the forward posts 12 are secured together hy cross channels 15.

A crown 18 is swingahly attached to the upper end of the suppoming structure. Members 19 are secured to the upper-ends of the posts 11, which are pivotally secured by pins 20 to plates 21 which are attached to horizontally extending channels 23 of the crown 18. Members 25 are secured to the upper ends of the posts 12 which are secured by pins 26 to the plates 27 secured near the forward ends of the channels 23. Bearings 29 are mounted at the rear ends of the channels 23 supporting a shaft 30 on which rear reciprocating chain sprockets 32 are rigidly secured. Bearings 34% are supported at the forward ends of the channels 23, rotatably supporting a shaft 35 on which forward reciprocating chain sprockets 36 are rigidly secured. Also on the shaft 35 be" tween the forward reciprocating chain sprockets 36 there is rigidly secured a for-- ward counterbalance chain sprocket 33. Bearings 39 are supported near the central parts of the channels 23, rctatahly supporting a shaft 41 on which a central counterbalance chain sprocket a2 is rigidly secured. The crown 13 is adapted for swinging into raised position. To accomplish this, the pins 26 are removed ir'orn place, which do taches the forward ends of the channels 23 4." ft from lov r o3? crot crown own T o to 11 in elignment with the beerings L Shofts extencl through the peits of bearings 51 and ltigidl secured on the inter owls of shafts 55 etcolcit'e cltets 5? which in alignment with the wen 131p ulKFJlLS Gears 58 are secured the at it J between the pairs of beer- 51 5th goers 595 etc engaged by eers 5 l1 ere rigiclly secured on e 1t of which is seppot'tecl by beet- I ..,ocured to the frame 53. A sprocket is secotecl to on cxtemlimg end of the oi ft co, moons the counters to driven. Extending between the o of drive end driven sprockets t'e etic'ileeo chains 85. "When the 60 is totetecl, the clrive sproclc 2 'e'bl y chit/c t toy mecca: of the "8,, which cote-ates the shafts eiftese choice 55 etc thus driven 7 driven sprocket-e 57 enn io'uoesty et it on m rate of speed As shown clearly in e 5 to 8 inclusive,

" e c l0 ettecltecl to the endless chains 1;! (ere ll; ot the f-[Olm ere secured. to the to by 'oivot pine'lf i of oojeccnt links of these chemo. As clearly shown in. lfigen *5 cues extend through the links e c oeomgc 'Ze'l- :tormccl m the idleclo. of the pairs ct fingers 71 M ym W W t 111W P central jom'eel l8 t'. it, hearing Z9, comprising" e lolcclz; incl o 81 which we tightly secured together loo 82A, o cylimlmctil o penio in Whic "5.. joeieeel portion 78 ot the a ol 5 r w A121 mm to ot the block E6 is pivotell connected to the lower end o con ectot chem 87, by means of e pin wlclclt extends through the mm 85 and throm i e lower link of the connector Cllttltl 87.

The upper eml of the connector choic 87 is secured between the legs 91 of on etteclo m et :memtec pic.- 93. Acme 95 of the chmect meczitei 9% pivotelly so lo" pine to code 01? tecipcocotimg e 53 which is attached to the vertical clearly shown in Figs. 1, 2 encl 3, the reciprocating chains 98 extend over the IQttlt and forward reciprocating chain sprockets 32 cool 36. The forward ends of the reciprocating choice 98 are secured to bearings 100 o. heed 104 The lieccl 10% is eclap ted to sopport polish rod. 106.

The polish rocl 106 extends through at stufloox 10? (Fig l) Whic'i is secured at the upper end oi. a, pump tubing 108. E1;- teoding' from the polish rod. 106 is ostring of socket rods 109, to which it pump plunger 110 adopted to reciprocate in e pump barrel 111 is secured, the pump barrel being etteched ot the lower end (it the pump tuoing 108.

Between the bcocings 1% on the shaft 101. there is placed o central heating 115, to which the forward. end. of the counterbalance chain 116 is secured. The counterbalance chein 1.16, as clearly shown in Figs. 11, f2 enrl 3, extends ovec the torworil coocterloelence chain sprocket 38 end over the control countei'bolooce choiti sprocket 4? A. counterbalance Weight 118 is secured to the teen cool of the counterbalance chain. 116 by means of on eye bolt 119.

The operation of my invention is sub stantie'lly as follows. The couotet-sltofi; ecis cotetebly driven by means of e cllein, not shown, which may be extended to the epic et 63. The endless chains 65 are driven. through it continuous path at a uniform rote of speed as previously (lescribecl. The connector chain 8'? being attached to these endlose chains to by moons of the yoke to @116. the booming l9 moving therewith, the lower coil. of the connecto i g? follows the some petlo es the endless clieins 65. The yoke EU is so constructett that it may be carried; by the endless chains 65 end not present interference to their moving over the drive etocl driven sprockets 5? coed 48.

clearly shown by (iott/ed lines, 120 m 'Z', teeth of either of the s Pockets 5'3 or extend into the opening" 75 etweenthe fic 'ets 71 "when the "cortices of the chemo (L5 #5 A 5 to "which the yolte to is securecl, peas over epcoclzcts. The reciprocating chains thetewitlo encl the pump plunger 1.16 is recipcoca-ted Toy moons of to string of socke totls cool the potish rod; 109 one: we respec tivcly. lflie weight that time olish we lot;

tm ooeee upon the reciprocating choice @8' is counterbalanced by the counterbalance weight 118 and the power consumption of the pumping mechanism is thus greatly reduced.

As shown in Fig. 1, the forward reciprocating chains 98 and sprockets 36 are so mounted that the pull of the reciprocating 1, the vertical travel of the yoke 70 extends almost entirely the complete orbit of its mo tion., At the end of the vertical travel of the yoke, it decelerates in vertical motion when it comes into engagement with either of the sprockets 4:8 or 57, and then accelerates in vertical travel, reachin its maximum as it leaves either of the sprockets 48 or 57. The time taken for deceleration and acceleration in vertical direction occupies a very small period oi time in respect to the entire cycle of motion; therefore, the pump plunger 110 will be driven by means of my pump operating mechanism at a maximum and uniform speed throughout nearly the entire len h of its stroke, this being favorable to an e cient operation of the pump. The yoke and bearing arrangement 7 O and 79 permits a connection of the connector chain 87 to the endless chains without any interference to the operation of the endless chains of the drive and driven sprockets. The fingers 71 of the yoke are secured on adjacent pivot pins 72 of the link73 and do not interfere with the enter-ingot teeth between these fingers into the spaces 7 5.

The mechanism is especially designed to provide an exceptionally long stroke for a reciprocating pump plunger. The length of the stroke may be varied by changing the distances between the drive and driven sprockets 57 and 48; in other words, by lengthening the orbits of" the endless chains 65. When it is necessary to pull the pump from the well, the entire mechanism may be taken from the derrick or the crown 18 may be swung into raised position so as to give free space above the pump tubing 108 that it maybe removed from the well.

I claim as my invention:

1. An apparatus or the class described comprising: a supporting structure adapted to'be mounted in a derrick substantially to one side'of the well axis thereof; a flexible reciprocator movably supported by said sup porting structure, said flexible reciprocator comprising a plurality of flexible members adapted to travel over pulleys sup orted by said supporting structure; means or attaching one end of said flexible reciprocator to a polish rod in said derrick; mechanism for reciprocating'said reciprocator supported by said supporting structure, said mechanism comprising a rotatable drivemember, a rotatable driven member, an endless member extending around said drive and driven members, and means for driving said drive member in order to continuously move said endless member; and means for joining said reciprocator to said endless member, said reciprocator being reciprocated bysaid endless member.

2. An apparatus of the class described comprising: a supporting structure adapted to be mounted in a derrick; a flexible reciprocator movably supported by said supporting structure; means'ior attaching one end of said flexible reciprocator to a polish rod in said derrick; mechanism for reciprocating said reciprocator supported by said supporting structure, said mechanism comprising a rotatable drive member, a rotatable driven member, an endless member extending around said drive and driven members, and means for drivin said drive member in order to continuous y move said endless member; means for joining said reciprocator to said endless member, said reciprocator being reciprocated by said endless member; and counterweight means for conuterbalancing the weight imposed u on said reciprocator by said polish rod, sai counterweight means being attached to said :reciprocator between said reciprocating mechanism and said polish rod.

3. An apparatus of the class described comprising: a supporting structure; a crown so secured to the upper end of said supporting structure as to be disposed to one side or the axis of an adjacent well; reciprocatingchain sprockets supported by said crown; reciprocating chains extending over said reciprocating chain sprockets; an elevator connected to said reciprocating chains, said elevator being adapted to support a polish rod; a connector attached to said reciprocating chains; a pair of drive sprockets; means for driving said drive sprockets; a pair of driven sprockets; a pair of endless chains extending over said pairs of drive and driven sprockets, said endless chains being continuously moved over said drive and driven sprockets at a uniform rate of speed; and means for joining said connector to said endless chains, thus reciprocally moving said reciprocating chains.

4. A combination as defined in claim 3 also comprising: counterweight chain sprockets supported by said crown; a counterweight chem extending over said counterweight sprockets, one end of said counterweight ing structure so that it may be vertically swung;

6. An apparatus of the class described comprising: a supportin structure; a crown secured to the upper end of said supporting structure; reciprocating chain sprockets supported by said crown; reciprocating chains extending over said reciprocating chain sprockets; an elevator connected to said reciprocating chains, said elevator being adapted to support a polish rod, a connector attached to said reciprocating chains; a pair of drive sprockets; means for driving said drive sprockets; a pair of driven sprockets; a pair of endless chains extending over said pairs of drive and driven sprockets, said endless chains being continuously moved over said drive and driven sprockets at a eanne's uniform rate of speed; a yoke comprising a central journal, arms extending from said journal, and fingers extendin from said arms, said fingers being secure to said endless chains; and a bearing member journalled on saidjournal and rigidly secured to said connector.

FRANK F. HILL.

California this v 

